10kV pole-mounted integrated reactive power compensation device

Abstract

The utility model discloses a 10kV pole-mounted integrated reactive power compensation device, which comprises a capacitor, a reactor, a capacitor switching switch, a current transformer, a voltage transformer, a controller, an insulating sleeve and a box body, the capacitor fling-cut switch is connected in series with the current transformer and is connected with the reactor, the reactor is connected with the capacitor, the voltage transformer is connected in parallel with the two-phase insulating sleeve, the voltage transformer, the current transformer and the capacitor fling-cut switch are electrically connected with the controller, and the power transformer supplies power to the controller. The capacitor, the reactor, the capacitor fling-cut switch, the current transformer, the voltage transformer, the controller and the like are integrated and packaged into a whole set of products, the problem that all parts are installed in a scattered mode is solved, and the reliability of product production and installation application is greatly improved. Meanwhile, the product can monitor the voltage and current changes of a line in real time and automatically carry out reactive compensation to achieve the effects of energy conservation and loss reduction.

Description

Technical Field

[0001] The present invention relates to the technical field of reactive power compensation of electric power systems, and in particular to a 10kV pole-mounted integrated collective reactive power compensation device. Background Art

[0002] With the continuous increase in electricity demand, the load of the distribution network is also growing. In this case, the loss of the distribution network is also increasing. By reducing the flow of reactive power, the purpose of reducing losses and saving energy can be effectively achieved. The current 10kV line reactive power compensation device has not formed an integrated or collective product, but each component is installed and applied separately. Since it is installed on the pole, there are many components and the installation is troublesome. At the same time, the quality of the components used is also uneven, resulting in poor operational reliability. In view of the development of the current market, an integrated, compact and highly reliable line reactive power compensation device is needed.

[0003] Xi'an Xiangrui Electric Manufacturing Co., Ltd. applied for a utility model patent on February 20, 2009: Patent No. 2009200319562, patent name is intelligent high-voltage reactive automatic compensation device. It uses a metal box to install capacitors, reactors, capacitor switching switches, voltage transformers, and current transformers in the box, avoiding the problem that the components in the box are greatly affected by the environment outdoors and the reliability is reduced. However, it can be seen from the pictures and contents of the patent specification that it only directly encapsulates the relevant components from the outdoors into the box, and simply arranges the positions of the components under the condition of meeting the insulation distance by referring to the insulation distance of the electrical components in the air. The reactive compensation device formed by the whole machine is relatively large in size. The reactive compensation device for 10kV lines is installed on the poles, which is difficult to install and difficult to implement. At the same time, the existing poles may not meet the installation of larger products. For the actual needs of the operation of the current 10kV lines, an integrated reactive compensation device with high reliability, small size and compact structure is needed to truly solve the problem and apply it. Summary of the invention

[0004] The purpose of the present invention is to provide a 10kV pole-mounted integrated reactive power compensation device to solve the problems in the above-mentioned background technology. The device adopts oil insulation, and the internal components are all miniaturized components. For example, the capacitor switching switch adopts a permanent magnet linear drive switch, which has a simple structure, small size, high reliability, etc. The structural design, fixed installation and electrical connection design are carried out according to the size, weight and function of each component, so that the whole machine is small and compact.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A 10kV pole-mounted integrated reactive power compensation device, characterized in that it includes a capacitor, a reactor, a capacitor switching switch, a current transformer, a voltage transformer, a controller, an insulating bushing, and a box;

[0007] The controller and the insulating sleeve are located outside the box, and the other components are located inside the box, which is filled with insulating oil;

[0008] The capacitor switching switch, the reactor, and the current transformer are fixed on the frame in the box through a mounting plate;

[0009] The voltage transformer is fixed in the box through the mounting bracket thereon;

[0010] The capacitor is located at the bottom of the box and is fixedly connected to the frame in the box through a fixing clamp thereon;

[0011] The capacitor switching switch is connected in series with the current transformer and connected to the reactor, and the reactor is connected to the capacitor;

[0012] The voltage transformer, the current transformer, and the capacitor switching switch are electrically connected to the controller;

[0013] The voltage transformer provides power to the controller.

[0014] According to a preferred implementation scheme of the present invention, the reactor, the current transformer, and the capacitor switching switch corresponding to each group of the capacitors are fixed to the box through the same mounting plate; the capacitor switching switch is fixed to the upper side of the mounting plate, the reactor is fixed to the lower side of the mounting plate, and the current transformer is fixed to the side of the mounting plate.

[0015] According to a preferred implementation of the present invention, the current transformer and the voltage transformer transmit the collected current and voltage to the controller, and the controller performs analysis and processing, and issues a control instruction to put the capacitor switching switch on or off, thereby putting the corresponding capacitor on or off.

[0016] According to a preferred implementation of the present invention, the capacitor switching switch adopts a linear structure, and its driving mechanism adopts a bistable permanent magnet driving mechanism to perform linear driving transmission.

[0017] According to a preferred embodiment of the present invention, it can be a single group capacitor device or a group capacitor device.

[0018] The beneficial effect of the present invention is that it integrates capacitors, reactors, capacitor switching switches, current transformers, voltage transformers, controllers, etc. into an integrated product, which solves the problem of scattered installation of various components. Users can only make technical requirements on the performance and functions of the complete set of products, which greatly improves the reliability of product production and installation and application; at the same time, the product can also monitor line voltage and current changes in real time to automatically perform reactive power compensation to achieve the effect of energy saving and loss reduction; at the same time, the product realizes a compact and small overall structure, which meets the needs of market development. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the appearance structure of a 10kV pole-mounted integrated collective reactive power compensation device of the present invention (the controller is installed on the box);

[0020] Figure 2 This is a schematic diagram of the appearance and structure of a 10kV pole-mounted integrated reactive power compensation device of the present invention (the controller is installed on the side of the box);

[0021] Figure 3 It is a schematic diagram of the internal structure of a 10kV pole-mounted integrated collective reactive power compensation device (two groups) of the present invention;

[0022] Figure 4 It is a schematic diagram of the principle of a 10kV pole-mounted integrated collective reactive power compensation device (two groups) of the present invention. DETAILED DESCRIPTION

[0023] See also Figure 1 and Figure 2 , showing two overall appearances, Figure 1 The controller is installed on the box. Figure 2 The controller is installed on the side of the box.

[0024] See also Figure 3 and Figure 4The structure and electrical principle of a two-group 10kV pole-mounted integrated reactive compensation device are shown (the dotted box in the figure is the electrical wiring principle of the device), including capacitor 1, reactor 2, capacitor switching switch 3, current transformer 4, voltage transformer 5, controller 6, insulating bushing 7, and box 8. The controller 6 and insulating bushing 7 are located on the outside of the box 8, and the other components are located inside the box 8, which is filled with insulating oil. The reactor 2, current transformer 4, and capacitor switching switch 3 corresponding to each group of capacitors 1 are fixed to the mounting frame 8.1 in the box 8 through the same mounting plate 9.1, the capacitor switching switch 3 is fixed to the upper side of the mounting plate 9.1, the reactor 2 is fixed to the lower side of the mounting plate 9.1, and the current transformer 4 is fixed to the side of the mounting plate 9.1; the voltage transformer 5 is fixed to the mounting plate 9.2 in the box through the mounting bracket thereon, and the voltage transformer 5 provides power for the controller 6.

[0025] The capacitor 1 is located at the bottom of the box 8 and is fixedly connected to the mounting frame 8.2 in the box 8 through the fixing clamps thereon. A mounting frame 8.3 is also provided at the bottom of the box 8, and a capacitor limit device 8.3.1 is provided on the mounting frame 8.3; the capacitor switching switch 3 is connected in series with the current transformer 4 and connected to the reactor 2, and the reactor 2 is connected to the capacitor 1; the voltage transformer 5, the current transformer 4, the capacitor switching switch 3 and the controller 6 are electrically connected.

[0026] The current transformer 4 and the voltage transformer 5 transmit the collected current and voltage to the controller 6. After analysis and processing, the controller 6 sends a control instruction to the capacitor switching switch 3 to switch on or off the corresponding capacitor 1. The capacitor switching switch 3 is turned on or off to complete the switching on or off of the corresponding capacitor 1. The capacitor switching switch 3 adopts a linear structure, and its driving mechanism adopts a bistable permanent magnet driving mechanism 3.1 to perform linear drive transmission to complete the switching on or off.

[0027] The above implementation method uses a two-group 10kV pole-mounted integrated collective reactive power compensation device for illustration, and its actual product can be a single-group or group device, which can be realized by adopting the above principles and structures. According to the changes or distribution of on-site load or reactive power conditions of different users, it is recommended to use a single-group, two-group, or three-group 10kV pole-mounted integrated collective reactive power compensation device, which is electrically connected to the 10kV line through a knife-fuse switch (drop).

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the technical principles of the present invention. These changes and improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A 10kV pole mounted integrated reactive power compensation device, characterized in that: Including capacitors, reactors, capacitor switching switches, current transformers, voltage transformers, controllers, insulating bushings, and boxes; The controller and the insulating sleeve are located outside the box, and the other components are located inside the box, which is filled with insulating oil; The capacitor switching switch, the reactor, and the current transformer are fixed to the frame in the box through a mounting plate; the voltage transformer is fixed to the box through a mounting bracket thereon; The capacitor is located at the bottom of the box and is fixedly connected to the frame in the box through a fixing clamp thereon; the capacitor switching switch is connected in series with the current transformer and is electrically connected to the reactor, and the reactor is electrically connected to the capacitor; The voltage transformer, the current transformer, and the capacitor switching switch are electrically connected to the controller; The voltage transformer provides power to the controller.

2. A 10kV pole mounted integrated reactive power compensation device according to claim 1, characterized in that: The reactor, the current transformer, and the capacitor switching switch corresponding to each group of capacitors are fixed to the box through the same mounting plate; the capacitor switching switch is fixed to the upper side of the mounting plate, the reactor is fixed to the lower side of the mounting plate, and the current transformer is fixed to the side of the mounting plate.

3. A 10kV pole mounted integrated reactive power compensation device according to claim 1, characterized in that: The current transformer and the voltage transformer transmit the collected current and voltage to the controller, and the controller performs analysis and processing, and issues a control instruction to switch on or off the capacitor switching switch, thereby switching on or off the corresponding capacitor.

4. A 10kV pole mounted integrated reactive power compensation device according to claim 1, characterized in that: The capacitor switching switch adopts a linear structure, and its driving mechanism adopts a bistable permanent magnet driving mechanism to perform linear driving transmission.

5. A 10kV pole mounted integrated reactive power compensation device according to claim 1, characterized in that: It is a single group capacitor arrangement or a group capacitor arrangement.

Images